A Torus Without Diagonals

https://www.gathering4gardner.org/g4g14gift/ExchangeArchive-Torus-G14-045-1.jpg
https://www.gathering4gardner.org/g4g14gift/ExchangeArchive-Torus-G14-045-2.jpg

Source

G4G14

Title

A Torus Without Diagonals

Creator

Akos Csaszar

Contributor

Gwen Fisher
Barry Hayes

Subject

Puzzle
Recreational Math

Description

Cut-and-fold a polyhedron with 7 vertices, 14 faces, 21 edges, and a hole through it like a doughnut. A cube has internal diagonals that connect the diametrically opposite corners. By contrast, this polyhedron has no internal diagonals. There are three other 14-faced polyhedra like this. The only other known example of a polyhedron with no diagonals is the tetrahedron.

Identifier

G14-045

Collection

Citation

Akos Csaszar, “A Torus Without Diagonals,” G4G Gift Exchange Archive, accessed July 24, 2024, https://g4gexchangearchive.omeka.net/items/show/1032.

Comments

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